Concrete-mixer and the like.



A. E. SMITH.

CONCRETE MIXER AND THE LIKE. A PPLIOATIOH FILED MAKZS, 1913.

E 9199, 11. 3%, Patented Feb. 23, 1915.

mmzssss INMENTO ALBERT E. SMJE'EH, OF WAFSI-IINGTON, DISTRICT OF COLUMBIA, A'SSIGFIOR TO THE 1. 1 SMITH COMPANY, Q13 MILWAUKEE, WISCONSIN, A CQItPOl-tATION OF WISCONSIN.

ince se.

application filed March 26, 1913.

for the rotatable drums of concrete mixers and similar machines, and the objects of my invention are to increase the simplicity, durability and mechanical efficiency of devices of this character. l. attain these objects by the construction shown in the accompanying drawing, in which- Figure 1 is a new of the machine transverse-to the axis of the rotating drum, some parts being shown in section; Fig. 2 is a view of the machine looking along the axis of the rotating drum; Figs. 3, 1- and 5 are fragmentary views of details of construction.

The rotatable drum of the concrete miner or like machine is designated by numeral 10.

This drum is supported and driven in any.

manner usual in machines of the non-tilting type, and vhas a feed opening 11 and a (ll..- charge opening 12 at its opposite ends.

13 is a loading bucket connected to the loading chute 1a, which chute enters the drum through its feed opening. The bucket is shown in its lowered position, resting on the ground, and while in this position, the door 15 may be opened by swinging it upward on the hinges 16, and the material to be loaded in the drum is placed in the bucket 13. The door 15 may be held closed by any convenient means, as the latches 17, to prevent material spilling out.

as the bucket is elevated.

The chute lt is supported in a ring 18 supported from the machine frame by arms 19, legs 20 and'braces 21 of any convenient form. The bearing ring 22 is formed integral with, or rigidly attached to, the chute it, and is provided with a projecting rib or flange 23 confined within the ring 18'by the ring plate 2 1 which is bolted to ring 18. The ring 18, the bearing of ring 22, and thedrum entering end of chute Mare all coaxial with the drum 1:0 and its feed opening 11. The gear sector 25 is also attached to the chute it or ring 18, and is engaged, by the pinion 26 on the shaft 2'7. As the loading bucket 13 is to beeperated intermit lipecification of Letters .i'atent.

Patented Felt. 23, 1915..

serial no. 756,903.

tently at will, a friction clutch is placed somewhere between the pinion 26 and its driving means. In the example shown, the

gear 28 runs loose on the shaft 27 and is connected therewith at will by means of the external friction member 29 attached 0 the gear being engaged by the internal friction member 30 which is slidable on the shaft 27 but is constrained to rotate therewith. A. lever 31 actuates the friction member 30 into and out of engagement with the member 29 in the usual manner.

32 is a brake Wheel attached to the shaft 27 and is engaged by. a brake band 33 by means of the brake lever 34:.

In operation, the bucket 13 and its attached chute 1d are actuated by the gearing 26 and 25 to swing around the axis of the drum as a center line until elevated sufiiciently to cause the contained material to slide y gravity through the chute 1t into the drum. The frictionclutch is then re leased and the return of the bucket to ground'is controlled by the brake 32-33. To prevent the bucket being elevated too far through carelessness, a knock-0d is provided consisting of a rod 35 engaging lever 31 and engaged by a cam lug 36 on the gear sector 25. By swinging the loading bucket around the drums axis the overhang of the load outside of the machine is constant and the minimum possible.

1n the example shown in Figs. 1 and 2, the mixer is of the non-tilting type. When the loader is to be used in connection with a mixer of the tilting type, the mouth of the chute 14: must be withdrawn from the drum when the loading bucket'is in its lowered position to allow the drum to swing past the chute in tilting, and while the bucket is discharging to the drum, the chute should enter the drum slightly to obviate spilling. This movement of the chute into and out of the drum is accomplished by the means shown in; Figs. 3, 4 and 5. Fig. 3 shows a ring 181 to be used in place of the bearing ring 18 of Fig. 1. lhis ring carries cam lugs 281 to be used in place of the rib 23 of Fig. 1. These cam lugs are similar to partial screw threads, and engage in corresponding grooves 222 in the ring 221, which takes the place of the ring 22 attached to the chute 14-. Fig. 4- shows a part of the rings 181 and 221 with the cam lug 231 engaged in the groove 222. Fig. 5 is a cross section on the line till a? lanai-so -4) of Figs. As the ring 221 is turned in the ring 181 While the bucket 13 is being elevated, 221 with the attached chute i l will be moved toward the drum and on lowering it will be withdrawn. While this movement is taking place, the gears 25 and 26 will change their relative positions slightly longitudinally of the gear teeth. r

' It will be understood that the illustration of this device is merely by Way of example and changes maybe made in details with out departing from the invention specified in the claims.

Whatll claim as my invention is 1. A loading device for a rotatable inixing drum having an axial feed opening, consisting of a bearin parallel with the axis of the drum, a loa ing bucket independent of the drum supported by said bearing and means for intermittently swinging said bucket on said bearing around the axis thereof as a center line.

2. A loading device for a rotatable mixing drum having an axial feed opening, consisting of a bearing coaxial with the drum,

a' loading bucket independent of the drumsnpported by said bearing and means for intermittently swinging said bucket on said bearing around the axis of the drum as a center me.

3. A loading device for a rotatable mixing drum having an axial feed opening, cons sting of an annular bearing coaxial with t e drum, a loading bucket independent of the drum supported in said bearing and 'means for intermittently swinging said bucket in said heating around the axis of the drum as a center line. v

r 4. A loading device for a rotatable mixing drum having an axial feed openin ,consisting of an annular bearing coaxial with the drum, a loading" bucket independent of the drum engaging said annular bearin and means for swinging said bucket in said bearing. said bucket havin' its discharge chute extending through sai annular bear- A loading device for a rotatable Inixing drum having an axial feed openinc', consist'ing of an annular bearing coaxia with the drum, a loading bucket independent of the drum having an attached chute extending through said annular bearin guide bearings positioning said chute a ong the drums axis and means for-elevating" said bucket around the drums axis.

6. A loading device for a rotatable mixing d rum having an axial teed opening con-- 'sisting of a supporting member having internal cylindrical and radial bearings co axial with the drum. a loading bucket independent of the drum having an attached chute extending through said supporting-5 member and engaging said bearings, and means for elevating said bucket around the axis of the drum.

7. A loading device for a rotatable min ing drum having an axial feed opening, consistin of a supporting member having a c vlin rical bearing coaxial with the drum,

a loading bucket having an attached chute extending through and engaging s id JQllT- ingq means for elevating said bucket around the axis of the drum and means for moving the mouth of the chute toward the drum as the bucket is elevated.

8. A loading device for a rotatable mixing drum having an axial. feed opening, consisting of a supporting member having a cylindrical bearing coaxial with the drum, a.

loading bucket having an attached chute extending through and engaging said bearing. means for elevatlng said bucket around the axis of the drum and cam lugs on one of nism engaging said gear sector adapted to.

elevate said bucket around the axis of the drum.

10. A. loading device for a rotatable Inn's lug drum having an .inl feed 'menin sisting of a supportag incmlm bearing coaxial with the drum. a loading:

bucket independent of the drum supportt;

ed by said bearing a train of gearing in cluding a friction clutch -For clevatin 5 c bucket. and a brake adapted to control tin lowering of said bucla'et.

l/Vi tness es rl. C imitating L. L. ARMSTRONG. 

